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Magnetic structures of the M2TbF6 (M=Li, K, Rb) fluorides: A complex behavior resulting from frustration

By Michaël Josse, Malika El-Ghozzi, Daniel Avignant, Gilles André and Françoise Bourée

Abstract

International audienceNeutron powder diffraction has been performed on Li2TbF6, K2TbF6 and Rb2TbF6 fluoroterbates. Incommensurate long-range magnetic order is observed below TN=2.02, 1.60 and 2.07 K. The square-modulating of the magnetic structures can be correlated with the geometric frustration induced by the pseudo-hexagonal packing of the [TbF6]2− chains in these hexafluorides. This frustration and the magnetic interactions are discussed on the basis of experimental data and topological considerations..

Topics: Fluoroterbate, Neutron scattering, Magnetic interactions, [CHIM.MATE]Chemical Sciences/Material chemistry
Publisher: 'Elsevier BV'
Year: 2007
DOI identifier: 10.1016/j.jssc.2007.02.011
OAI identifier: oai:HAL:hal-00175345v1
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